Particle model of matter

• What is the arrangement of particles in solids?

  Ordered
• What is the density of solids compared to other states of matter?

  High
• How do particles in solids move?

  Particles vibrate in fixed positions
• What are the states of matter and their particle arrangements?

  • Solids: Highly packed, close together, ordered arrangement
  • Liquids: Medium density, move and slide past each other, random arrangement
  • Gases: Low density, far apart, move freely and collide
• What is the process called when a solid changes to a liquid?

  Melting
• What is the process called when a liquid changes to a gas?

  Boiling
• What is the process called when a liquid changes to a solid?

  Freezing
• What is the process called when a gas changes to a liquid?

  Condensing
• What is specific latent heat?

  It is the amount of energy required to change the state of 1 kg of a substance with no change in temperature.
• What does latent heat refer to?

  Latent heat is the energy required to change the state of an object.
• What happens to the temperature of a substance during a phase change?

  The temperature remains constant during a phase change.
• What is the arrangement of particles in gases?

  Far apart
• How do particles in gases move?

  Particles move freely and collide with each other.
• What is the density of gases compared to solids and liquids?

  Low
• How does the arrangement of particles differ between solids, liquids, and gases?

  Solids are ordered and close together, liquids are random and medium density, gases are far apart and low density.